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ceph: don't WARN if we're still opening a session to an MDS

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[ Upstream commit cdb330f4b41ab55feb35487729e883c9e08b8a54 ]

If MDSs aren't available while mounting a filesystem, the session state
will transition from SESSION_OPENING to SESSION_CLOSING.  And in that
scenario check_session_state() will be called from delayed_work() and
trigger this WARN.

Avoid this by only WARNing after a session has already been established
(i.e., the s_ttl will be different from 0).

Fixes: 62575e270f66 ("ceph: check session state after bumping session->s_seq")
Signed-off-by: Luis Henriques <lhenriques@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Luis Henriques 2021-07-15 14:40:39 +01:00 committed by Greg Kroah-Hartman
parent ce8fafb680
commit fb28b15920
1 changed files with 1 additions and 1 deletions
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2
fs/ceph/mds_client.c
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@ -4401,7 +4401,7 @@ bool check_session_state(struct ceph_mds_session *s)
break;
case CEPH_MDS_SESSION_CLOSING:
/* Should never reach this when we're unmounting */
WARN_ON_ONCE(true);
WARN_ON_ONCE(s->s_ttl);
fallthrough;
case CEPH_MDS_SESSION_NEW:
case CEPH_MDS_SESSION_RESTARTING: